ORCHIDACEtE 



below with a hemispherical sac, when expanded about 4 mm. 

 long and 7 mm. broad, crescentic-obtriangular, three-lobed, with 

 a small quadrate reflexed lamina near the center, entire anterior 

 margin fringed with long clavate cilia; lateral lobes small, about 

 .8 mm. long, 1 mm. broad at the base of the free part, triangular, 

 acute, more or less falcately incurved ; middle lobe very broadly 

 triangular, acute, about 1 mm. long, 5.5 mm. wide to the base 

 of the side lobes. Column short, stout, about 1.5 mm. long, pro- 

 vided with a broad concave foot. 



This species resembles in habit Thrioospermum maculatum 

 Schltr. and T. Trichoglottis (Hook, f.) O. K. The lip of this plant 

 is very like that of T. agusanense Ames, from which it differs in 

 the very short peduncles and smaller flowers. T. crescentiforme 

 recalls a slender form of T. Wenzelii Ames, but the flower and 

 lip are very dissimilar. T. anceps Reichb. f differs from this spe- 

 cies chiefly in the much larger vegetative parts. The name is in 

 allusion to the general form of the lip. 



Marei Parei Spur, Clemens 238, November 1915. Flower white tinged 

 with pink. 



2. Thrixspermum triangulare A. ^ S. sp. nov. Herba ro- 

 busta. Caulis crassus, lignosus, vaginis foliorum omnino obtec- 

 tus. Radices crassae, fibrosae, rigidae, vaginas perforantes. FoUa 

 disticha, patentia, lineari-lanceolata vel linearia, apice obtuso 

 saepissime oblique bilobata, ad basim complicatam paulo angus- 

 tata, coriacea. Pedunculi folia multo excedentes, patenti-adscen- 

 dentes. Rachis complanata. Bracteae inflorescentiae distichae, 

 equitantes, ovato-triangulares, cymbiformes. Flos mediocris, in 

 sicco pellucidus. Sepala lateralia ovato-oblonga, apice late rotun- 

 data, sub apice dorso cornuta. Sepalum dorsale oblongo-ellipti- 

 cum, simile. Petala elliptico-oblonga, apice rotundata. Labellum 

 basi gynostemii adnatum, in circuitu orbiculare, distincte tri- 



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